use plotters::prelude::*;
const OUT_FILE_NAME: &'static str = "plotters-doc-data/3d-plot.svg";
fn main() -> Result<(), Box<dyn std::error::Error>> {
    let area = SVGBackend::new(OUT_FILE_NAME, (1024, 760)).into_drawing_area();

    area.fill(&WHITE)?;

    let x_axis = (-3.0..3.0).step(0.1);
    let z_axis = (-3.0..3.0).step(0.1);

    let mut chart = ChartBuilder::on(&area)
        .caption(format!("3D Plot Test"), ("sans", 20))
        .build_cartesian_3d(x_axis.clone(), -3.0..3.0, z_axis.clone())?;

    chart.with_projection(|mut pb| {
        pb.yaw = 0.5;
        pb.scale = 0.9;
        pb.into_matrix()
    });

    chart
        .configure_axes()
        .light_grid_style(BLACK.mix(0.15))
        .max_light_lines(3)
        .draw()?;

    chart
        .draw_series(
            SurfaceSeries::xoz(
                (-30..30).map(|f| f as f64 / 10.0),
                (-30..30).map(|f| f as f64 / 10.0),
                |x, z| (x * x + z * z).cos(),
            )
            .style(BLUE.mix(0.2).filled()),
        )?
        .label("Surface")
        .legend(|(x, y)| Rectangle::new([(x + 5, y - 5), (x + 15, y + 5)], BLUE.mix(0.5).filled()));

    chart
        .draw_series(LineSeries::new(
            (-100..100)
                .map(|y| y as f64 / 40.0)
                .map(|y| ((y * 10.0).sin(), y, (y * 10.0).cos())),
            &BLACK,
        ))?
        .label("Line")
        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLACK));

    chart
        .configure_series_labels()
        .border_style(&BLACK)
        .draw()?;

    // To avoid the IO failure being ignored silently, we manually call the present function
    area.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
    println!("Result has been saved to {}", OUT_FILE_NAME);
    Ok(())
}
#[test]
fn entry_point() {
    main().unwrap()
}